0.0

1994

6.5

2001

8.1

1992

6.5

2006

6.0

2006

6.0

2005

6.4

1995

7.6

1967

7.2

1996

7.1

1974

7.2

2003

7.2

2001

5.6

1984

9.1

1993

6.1

1994

6.2

1994

8.1

1996

4.7

2005

8.1

2005

7.2